html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  font-family: "Microsoft YaHei";
}

body {
  background: url("../images/bg.jpg") no-repeat center;
  background-size: cover;
  font: 14px "Microsoft YaHei";
  color: #4d4d4d;
  font-weight: 300;
}